One of the biggest loopholes in Colorado's registration system according to the Secretary of State's office is that immigrants who aren't allowed to vote can sometimes easily sign up on the voter rolls. That means that if they vote on Election Day, it would be an act of fraud.

His staff has shared documents with us on multiple occasions that they say make it clear how confused immigrants might accidentally sign up to vote, not realizing it's against the law. And right now, the system is clearly not equipped to make sure they don't register, Gessler argues, since federal records reveal that thousands on Colorado voter rolls could be immigrants.

A majority of those flagged by Gessler have in fact remained on the voter rolls -- and some county clerks say they are confident in the names that they've confirmed and kept on their rolls.

Still, 518 is more than initially expected, given that his final push to remove illegal voters happened so close to Election Day -- which Gessler says is a result of the fact that his staff just couldn't access federal records until late this summer.

That's a notable number relative to the mere fourteen voters that were removed after a first round of checks this fall. Still, critics are quick to point out that these numbers are an incredibly tiny percentage of voters in Colorado, such that the Secretary of State, as the chief election officer, should not be devoting so much time and resources to anti-fraud work.

Questions still remain about how many removed voters have in fact cast ballots in past elections and likewise how many of the alleged non-citizens -- at least according to Gessler's checks -- ended up voting this cycle.

Regardless, it is likely an issue that Gessler will continue to work on going forward. As one of the reports from his office on the matter says, "The true scope of the problem is unknown."